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      06-04-2014, 12:03 PM   #128
bmwarg
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Drives: 2008 E90 335i, 2012 E70 50i
Join Date: Jun 2013
Location: Chicago, IL

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Quote:
Originally Posted by Efthreeoh View Post
If it didn't overheat, then no, it didn't damage the engine. Not sure where you live, but you should be okay. That amount of water did change the ratio much. You can always check the coolant protection level with a antifreeze hydrometer.

Your mechanic doesn't know what he is doing either. Take your car to a mechanic who is trained to work on BMWs.
Next time I'll just take this DIY and ask them to follow it. I never got an engine overheat signal (at least not when I was operating the vehicle). I live in San Francisco so the temperatures are pretty moderate.

This morning I ran the venting procedure again when the engine was bone cold and removed the excess coolant with a siphon because it was past the max indicator. Apparently the mechanic added too much distilled water when topping off.

Do I have to bleed or vent again because I removed some coolant from the reservoir?
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2008 E90 335i: JB4 G5 ISO | BMS Pump Gas Backend Flash | ER Charge Pipe | n54Tuning DPs | ETS FMIC

Last edited by bmwarg; 06-04-2014 at 12:29 PM..
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